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Henry,
Thank you for your interesting information.

> I suppose there might be some argument with respect to
> methodology if the time between determination of
> errors was particularly great,

Strangely enough, I do not find any instructions on
determining the chronometer rate in the navigation
manuals that I have.

I would imagine the following procedure (before the
use of radio). While a ship is in a harbor, the correction
would be determined daily by the time signals
(gun shots, falling ball). From this the daily rate will
be derived. And then used until the next harbor with time
signals.

> daily rate of 1.5 seconds losing. From a practical

Very close to my chronometer: my one is loosing 1.37 sec
per day so far, and this is constant within a second.

Here is a difficulty by the way: how do I determine
the correction with say 1/2 second accuracy?
The chronolmeter clicks and shows every 1/2 second.
But my electronic watch (and Internet) clicks with
only 1 second frequency, so errors of comparison are
sometimes more than 1/2 second.

> point of view, it was customary to request a new
> chronometer be set slow so that the error be additive
> -I guess true sailors didn't subtract too well.

That's a very good point!
Now I know why my chronometer is 1.2 sec slow:-)

By the way the factory certificate I have contains a lot
of information from which I can infer how they were tested.
I can post the details if there is interest.

I cannot repeat this test because it involvs
five 5-days periods
running under given constant temperature:-)

Alex.



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